Sewing-machine.



SEWING MACHINE.

APPLICATION FILED MAR. 19, I917 Patented Aug. 20,1918.

3 SHEETS-SHEET 1 Wireless G. S. HILL.

SEWING MACHINE.

APPLICATION FILED MAR. 19. 1911.

Patented Aug, 20, 1918 3 SHEETS-SHEET 2.

e. s. HILL.

SEWING MACHINE APPLICATION FILED MAR. 19' I911.

Patented Aug. 20, 1918.

3 SHEETS-SHEET 3.

following to be Eu Figioeifioetion of Letters Itztten't.

neresse.

original application filet'l Irene-1s, i i

To all whom it may -22mm:

Be it known that ii, Gnome citizen of the Unites Strefiort'i, in the county oi State of Neo Hampshire, have tain new sin-1i useful iprov ing-irlnohines; and l:

scription o eble others pertains The pr apoiieet-ion i 1916.

h Whenisrn for coop i needle or needles of the sewing Heretofore it has been oustoin- .eehin s the class to the osoilleting looper points, and

points laterally, ego-inst which the spreetiers ies the spreetier 'ionary ozuns i t spreader-s are alternately can rierl oscillations of the looper earriefr, o1 oy similar cems which are moved to meet the Spreaders, the spreeclers in either or)? held in normal position on the looser carrier by springs which yield as the tails of the spreetiers ride on to the spreader mating cems. The use of springs end bunt cams with which the spreeders contact during the O$Clll2ii7l0ll oi the looper carrier'is objectionable, end-limits,

oil)

the. speed at which the mechanism may be operated. The oh eetloneble springs and hunt or sliding earn. connectionsnre oliiniiii? 'lizttijil in the looper and loop spreader meehnventlon by provuli s independently of the enisr of the presen IIIGCilttETElSHl which act reciproezw n of the looper carrier, to give the tron usse loop spreading movements.

These mover ents are prefers )ly eil'eetei through positive eo neotions from en es centric or other etor, so that thee m tion of the mechanism will he uniform z certain at high speeds, for which. the i. iiofistructions are unsuited.

the on C lte tentetl 2Q, 1918,.

The verions features oi" the invention Will be readily unclerstoocl fromen inspection of .the accompanying drawings and. the following detailed. description of the machine shown therein.

In the drawings, Figure 1 is a sectional elemtion showing so much of e buttonhole machine as is necessary to illustrate the application of the present invention thereto 2 e partial transverse sectionol elevation on line 525, Fig. 1; Fig. 3 is a detail plan view of the turret which carries sewing; mechanism; Fig. 4b is 2. sections eievation on line &, Fig 3; and

to 13 are diagrammatic views showing the mode of: operation in forming overy seem stitches, Fig. 13 being a sectional View on line 13,-l31g. 3.2.

in the drawings, he invention is shown as embodied. in a, buttonhole melnng machine ing mechanism which is rotated during the sewing about the eye of the buttonhole, and which comprises vertieelly reciprocating and laterally vibrating or jogging upper needle and cooperating looping and loop s )reetlin devices nrren 'ecl below the Work.

in the umcnine shown the Work clam s intimated et 2 are mounted u on the Work supporting pistes 4 Which are pivoted on a,

longitudinally and laterally moving clamp carriage 6. The clenip's ere automatmally closed at the beginning of the sewing, and

are automatically opened after the completion. of the bnt'tonhole, by mechanism which forms no pert the present invention, and Whieh need not be described. The'buttonho e slit out after the completion of the by a cutter v8 operated by a corn on the mein osrm shaft of the machine. The work oorriecl by the clamp over a throat plate 10 moimtecl on the turret 12 which carunder looping ancl loop spreading mechanism.

enihotliment of the invention shown, the sewing mechanism is etiapted to term the Well-known Humphrey stitch and comprises a vertieelly reciprocating and late orally jogging upper neeclle 14:, and two peers or opposed looper and loop spreader throat plate and constructed to alternately enter the loops thrown out by the needle.

' The two looper points 16 and 18 which cooperate with the upper needle in forming the stitches are secured in the arms 20 of a looper carrier 22which is provided with two bearings 24 mounted to turn on the inner ends of studs 26 which are secured in lugs 28 projecting from the upper edge of the turret (Figs. 2 and 3). The looper 1 6 is provided with a thread guide and thread eye for the under thread carried by this looper. The looper. carrier is oscillated through a link comprising a lowentubular part 30, to the upper end of which is adjustably secured an arm 32 pivotally connected at its upper end to the looper carrier. The lower end of the link is connected by a ball joint with the forward end of a lever 34, the rear end of which is connected to the lower end of a rod 36. The upper end of the rod carries a fork 38 which embraces a three-cornered eccentric 40 on the sewing shaft. The fork is supported and guided by a link 12. The'loop Spreaders which cooperate with the loopers comprise two spreader points 44 and 16 secured in the upper ends of'two vertical arms of a spreader carrier lever 48 and arranged to overlie the loopers 16 and 18. The spreader carrier, is mounted on a pivot 50 carried by the looper carrier and arranged at right angles to the axis of the looper carrier. The carrier lever isprovided with a horizontal arm 52 arranged substantially in the axis of the looper car rier, and having its outer end connected by a ball and socket joint to the upper end of an arm 54, the lower end of which is adjustably secured to the upper end of a tube 56 which extends down through the tube 30, and is connected at its lower end by a ball joint to the forward end of a lever 58, the tube and arm forming a link connecting the lever 58 with the spreader carrier lever. The under looper thread asses up through the tube 56 to a tension rfevice 57 on the turret, from which it leads through suitable. thread guides to the looper 16.. The spreader carrier lever is oscillated by an eccentric 60 on the needle shaft which engages the upper end of a rod 62, the lower end of which is connected to the rear end of the lever 58.

, In this construction the transverse loop spreading movements are not eflected by or dependent upon the reciprocatory movements of the carriers, but are effected independently of such reciprocatory' movements, and by positive connections between the transversely movable carrier and the actuating eccentric or other actuator. The looper and spreader mechanism is therefore well adapted for operation at maximum speed.

The mode of operation of the loopers and Spreaders in cooperating with the upper needle to form the overedge stitches is illustrated in Figs. 5 to 13. During the depth stroke of the upper needle the looper carrier is rocked toward the left in Fig. 5 to project the end of the looper 18 and the overlying spreader point L6 through an upper needle loop thrown out by the needle as it starts upward from its lowest position. This loop is carried toward the left by the looper 18 into the position indicated in Fig. 5, and as it is carried into this position the spreader lever is rocked transversely of the direction of travel of the looper to spread the loop, as indicated in Fig. 6, so that during the slit or edge stroke of the needle it will pass down through the loop of upper thread. After the needle has entered the loop, the looper carrier is rocked toward the right, the spreader lever being rocked to reward, the position of the parts as the looper is entering the needle loop being indicated in Figs. 9 and 10. The continued movement of the looper carrier toward the right car- I ries the under looper thread through the loop of needle thread, and the spreader lever is rocked to move the spreader trans versely of the looper and spread the looper thread and present it in position for the passage of the needle during the next depth stroke, as indicated in Figs. 11 and 12.

After the needle has passed through the loop of looper thread, the looper carrier is again rocked toward the left, the spreader lever being rocked to return the spreader-s into position above the loopers, so that the looper 18 and spreader 16 may again take a loop of upper thread from the needle, spread it, and

present it in position for the passage of the needle during its next slit stroke.

The mechanism for vibrating or jogging the needle 14 comprises a vertically reciprocating and laterally vibrating carrier sleeve 64 within which the needle bar 66 reciprocates. -The carrier sleeve is reciprocated ver- .horizontal arm of which is connected by a ball joint with the upper end of the sleeve, and the vertical arm of which is connected by a link 70 with an eccentric on the sewirig shaft. The lower end of the sleeve is moved laterally by a link 72, one end of which is connected to the sleeve, and the other end of which is connected with a pivot 74. on a rotary head 76. lVhen the sleeve is moved downward the link acts to swing the lower end of the sleeve and the needle bar toward the right, so that the needle bar will be posleeve is raised the link acts to swing the navaesa Since the needle shaft makes two revolutions for each revolution of the sewing shaft, the needle carrier will be moved to the right during one reciprocation of the needle, and

to the left during the succeeding reciprocation, so that the needle will be vibrated or jogged to alternately form the depth and edge or slit stitches.

The rotary head 76 in which the carrier sleeve and needle bar are carried, and the rotary turret 12 in which the looper mechanism is carried, are rotated in, unison during the sewing about the eye of a buttonhole through shafts 82 and 84L geared to the head and turret, and operated by connected gear segment levers 86 and 88, one of which is providedwith an arm carrying a roll engaged by a cam on the cam shaft of the machine.

The loop entering points of the looper and loop spreader mechanism are preferably provided with shanks which fit and are clamped within sockets at the upper end of the carrier arms, so that the pointsmay be readily secured in place or removed. This enables adjustments or repairs to be readily made, and also enables difierent forms of points to be readily substituted in case a change in the character of the seam, as, for instance, a change from a two-thread to a one-thread seam, is desired.

While the invention has been shown and described as embodied in a construction in which two opposed looper points are secured in a reciprocating or oscillating support, and

- two cooperating spreader points are secured in a transversely movable Barrier mounted on the oscillating support, it Wlll be understood that certain features of the invention are not limited in their application to mechanism embodying two pairs of looper and loop spreader points, but may be embodied with advantage in mechanism embodying a less number of spreader or looper points, and it will also be understood that the specific manner of mounting and arranging the looper and loop spreader points shown and described is not essential, and that-the points may be otherwise mounted, or may be otherwise distributed or arranged on the support and carrier to secure the relative transverse movements between the spreader and looper points requisite for properly coiiperating with the needle in forming the stitch for which the sewing mechanism in which the invention is embodied is designed or intended. it will also be understood that the invention is not limited to the specific construction and arrangements of parts shown and described, but may be embod ed other constructions, and that the specific construction or arrangement of the parts may be varied or modified as found desirable or best suited to the machine or mechanism in which the invention is to be embodied.

Having explained the nature and object of the invention, and specifically described one form of mechanism in which it may be embodied, what is claimed is 1. A sewing machine, having, in combination, an upper needle mechanism above the work, and looper and loop spreader mechanism below the work comprising a reciprocating looper carrier, two loopers thereon, cooperating loop spreaders mounted to move with the loopers durin their reciprocation,

and mechanism acting independently of the reciprocation of the looper carrier to relatively move a looper and 00- operating spreader transversely each stroke of the looper carrier.

2. A sewing machine, having, in combination, an upper needle mechanism above th'e work, and looper and loop spreader mechanism below the work comprising an oscillating carrier, a transversely movable carrier moving with the oscillating carrier,

looper and loop spreader pointson the carr1ers, an actuator, and positive connections .from the actuator to the transversely movable carrier for imparting transverse reciprocations thereto.,

3. A sewing machine, having tion, an upper needle mechanism v work, and looper and loop spreader mechain combinanism below the work comprising an oscillating carrier, a transversely movable carrier mounted thereon, looper and loop spreader points-on the carriers, an eccentric, and positive connections from the eccentric to the transversely, movable carrier for reciprocating said carrier transversely.

4:. A. sewing machine, having, in combination, an upper needle mechanism above the worln'and looper and loop spreader mech anism below the work comprisin reciprocating looper points, loop sprea er points mounted to move with the looper points and connected to move transverselyin unison,

and mechan sm for moving the spreader points transversely toward and from the looper points.

5. A sewing machine, having, in combina tion, an upper needle mechanism above the work, and looper and loop spreader mechanism below the work comprising an oscillating looper carrier provided with looperpoints, a spreader carrier mounted on the looper carrier and provided with loop spreader points, an actuator, and positive connections from the actuator to v the spreader carrier through which transverse movements are transmitted to the spreader points.

6. A. sewing machine, having, in combinaabove the nevaoec tion, an upper needle mechanism above the work, and, looper and loopspreader mechanism below the work comprising an oscillating looper carrier provided with looper points, a spreader carrier mounted on the looper carrier and provided with loop spreader points, an eccentric, and positive connections from the eccentric to the spreader carrier for transversely reciprocating the spreader carrier."

4., A sewing machine, having, in combination, an upper needle mechanism above the work, and looper and loop spreader mechanism below the work comprising an oscillatin support, a carrier mounted. on the support to oscillate about an axis substantially at right angles to the axis of the support and provided with loop engaging pomts, A echanism "for, oscillating the support, and

mechanism for oscillating the carrier on the port at twice the speed of the support. A sewing machine, having, in com mation, an'upper needle mechanism above the work, and looper and loop spreader mechanism below the work com rising an oscillatcarrier, a second carrier mounted thereon to rock about an axis substantially at right angles to the axis of the oscillating carrier, mechanism for oscillating the first carrier and for rocking the second carrier at.

twice frequency of the first mentioned and looper and loop spreader points on the respective earners.

A sewing machine, havin in combine time, an upper needle mechanism above the work, and looper and loop spreader mechanism below the work comprising a looper rier, a spreader carrier mounted to move with and transversely of the looper carrier, loopers on the looper carrier, and two cooperating loop spreaders on the spreader carrier.

10. A sewing machine, having, combination, an upper needle mechanism above the work, and looper and loop spreader mechanism below the work comprising two carriers mounted to reciprocate in unison and for relative movement transversely of their line of reciprocation, and two pairs of lcoper and loop I spreading points on the carriers.

11. A sewing machine, having, in combination, an upper needle mechanism above the work, and looper and loop spreader mechanism. below the work comprising an oscillating support, a earner lever mounted to rock on the mpport about an axis substantially at angles to the axis of the support, loop engaging points on the carrier lever, and actuating connections for rocking the carrier lever connected therewith at a point substant the axis of the support.

12. A sewir acl'iinahaving, in combination, an upper mechanism above the work, and looper and loop spreader mechanism below'the work comprising an oscillating looper carrier prov1ded with looper points, a spreader carrier mounted to rock on the looper carrier and provided with loop spreader points, and actuating' connections for the spreader carrier connected therewith at a point substantlally in the axis of the looper carrier.

riers, and mechanism for oscillating one of the carriers about an axis substantially parallel to the direction of travel of the points.

it. A sewing machine, having, in combination, an upper needle mechanism above the work, and looper and loop spreader mechanism below the work comprising an oscillating support, and a carrier mounted on the support to oscillate about an axis substantially at right an has to the axis of the support and provide I with loop engag points.

15. A sewing machine, having, in combination, a'rotary upper needle mechanism, a turret below the work, looper and loo spreader carriers on the turret provide with looper and loop spreader points, mechanism for reciprocating the carriers in unison to introduce the points, into and withdraw them from the needle loops, and mechamsm for reciprocating one of the carriers transversele twice for each reciprocation of the carriers in unison.

16, Asewing machine, having, in combi- 18. A sewing machine, having, in combination, a rotary upper needle mechanism, a turret below the work, looper and 100 spreader carriers on the turret provided wit looper and loop spreader points, rocking levers below the turret, and tubular links con necting the levers and carriers and arranged one within the other.

19. A sewing machine, having, in combination, a rotary upper needle mechanism, a turret below the worlcfan oscillating looper carrier on the turret, loop spreaders mountnewness ed on the carrier, two rocking levers below the turret, and links connected to operate the looper carrier and loop Spreaders and having their lower ends connected with the levers by ball joints.

20. A sewing machine, having, in combination, a rotary upper needle mechanism, a turret below the work, an oscillatin' looper carrier on the turret provided witi looper points, cooperating loop Spreaders on the carrier, a lever below the turret, a link having its upper end pivoted to the carrier and having its lower end connected with the lever by a ball joint, and means for operating 1 the loo spreaders.

21. sewing machine, having, in combination, an oscillating carrier, a second carrier mounted to oscillate with and transversel of the first carrier, looper and loop sprea er points on the carriers, and mechanism for oscillating the second carrier at double the frequency of the other carrier.

22. A sewing machine, havin in combination, an oscillating carrier aving. two arms in which two opposed loop entering points may be secured, a second carrier mounted to rock transversely on the first carrier and having two arms in which two opposed loop entering points may be secured, and mechanism for oscillating the first carrier and for oscillating the second carrier at double the frequency of the first carrier. I 23. A sewing machine, having, in combination, an oscillating carrier a second canrier mounted to oscillate with and transversely of the first carrier, and sockets in the carriers for carrying two pairs of oppoints.

posed loop entering Q GEORGE S. HILL. 

